When do I know it’s my period??

Megan

I lost my baby at 18 weeks. I delivered her and bled for about 2 weeks. It’s been one month since I lost her and I am bleeding again. Tuesday I bled. But no bleeding Wednesday at all. Now today (Thursday) it’s heavier. Is this a period? Or should I be concerned? My doctor office is closed today so was going to wait until tomorrow to call. We did have sex last night, but it wasn’t our first time since everything happened so wasn’t sure if that had anything to do with it.